Plural of dimissary; people or documents authorized to dismiss or grant permission for someone to leave a position or jurisdiction.
From dimissary (based on Latin dimissoria, from dimittere 'to send away'). This is a ecclesiastical term referring to letters of dismissal granted by one bishop to another.
In medieval church law, dimissaries were incredibly important documents—they allowed priests to move between dioceses, essentially serving as official permission slips that could travel across kingdoms.
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